Dishwasher



M. T. ASHE DISH WASHER March 10, 1,942.

Filed Jurie '7, 1959 2 Sheets-Sheet 1 0 Z w a INVENTOR ATTORNEY M. T. ASHE March 10, 1942.

DISH WASHER Filed June '7, 1959 2 Sheets-Sheet 2 Patented Mar. 10, 1942 UNITED STATES PATENT OFFICE,

attain msnwasnaa Marselius 'r. Ashe, Garden City, N. a.

Application June '1, 1939, Serial No. amps lclaim.

This invention relates to dish washers in general and more especially to dish washing machines having a standard tank and a water agitator associated therewith.

Among the objects of the present invention. it is aimed to provide an improved dish washing machine having a tank for receiving a tray or trays of dishes, cutlery and the like, and a water agitatorassociated with the bottom of the tank for directing the water upwardly along the sides of the tank and then inwardly on to the dishes and cutlery to be washed.

It is another object of the present invention to provide an improved dish washing machine having a tank free of any interior obstruction associated with a water agitator for directing the water upwardly along the walls of the tank and then inwardly upon the dishes and cutlery 1 to bewashed.

It is still another object of the present invention to provide an improved dish washing machine having a double walled container for receiving trays of dishes, cutlery and the like, and a water agitator associated with the lower end of the tank for directing the water up along the sides of the wall and devices associated with the agitator and walls of the tank for thereupon directing the water inwardly upon the dishes and cutlery contained in the trays.

These, and other features, capabilities and advantages of the invention will appear from the subjoined detail description of one specific embodiment thereof illustrated in the accompanying drawings in which Figure l is a transverse section of a dish washing machine made according to the present invention; and

Fig. 2 is a plan of the same with parts broken away.

In the embodiment shown there is illustrated.

a tank i having an outer wall 2 consisting of an upper cylindrical portion 3, and a lower inwardly flaring stepped bottom 4. Inside of the outer wall 2 there is provided an inner wall 5 having an upper cylindrical portion 6 fitting within the cylindrical portion 3 and having an inwardly flaring bottom 7 fitting within the bottom 4 and terminating in the outwardly extending conical flange 8. The outer tank 2 is shown in the present instance as supported by the platform I- having a cylindrical opening to receive the tank I and permit the outwardly extending flange II to rest on the upper surface of the platform I surrounding the tank as indicated. This flange it in the present instance is shown assumed to the platform 9 by three wood screws H, I! and I3, preferably equally spaced from one another. In the present instance the flange is provided with a raised portion I having a bayonet slot l5 therein to receive the projections H6 in the annulus I], having the inwardly extending flange I8 and the shoulder l8 above the flange l8. The flange l8 as shown, preferably has a concave face flaring downwardly and outwardly above the cylindrical chamber ,20 formed between the cylindrical walls 3 and 6 "of the tanks 2 and 5. The outer edge of the flange I. as shown preferably snugly engages the inner face of the wall 3 of the outer container 2. The shoulder l9 as shown is provided to form a seat for the cover 2|. The annulus I1 is thus readily removable by merely rotating the same so that its pins 16 may be moved, from the diminished portions to register with the enlarged portions of the bayonet slots l5 and, then the annulus I! raised relative to the tank element 24 The annulus I! may preferably be chromium plated and conceal the flange ill of the container 3, the outer edge of the annulus I'l resting as shown on a surfacing element 22 such as linoleum, Monel metal or the like. This surfacing stock 22 as is customary with modern sink construction is generally matched with a second surfacing element 23 secured to the verticalwall 24 connected to the building uprights, such as the uprights 25. Over the front edge of the sheet 22 as shown in Fig. 2, there may be secured a metal trimming 28 composed of a chromium plated sheet metal strip or the like.

In the present instance, there is connected to the wall 4 of the outer tank 2, a casting 21 which performs the several functions now to be described. As an instance, it has a lower tubular extension 28 to receive the journal packing for the shaft 29. In the next place it has an upwardly flaring element 30 having an outwardly stepped surface conforming with the outwardly stepped elements 3| and 32 of the wall portion 4 of the outer wall 3. In the next place it has a conical seat 38 to receive the lower face of the impeller 34. Still furthermore it has extending upwardly therefrom the v-shaped baflie plates "which serve to change the direction of the water being agitated in a manner hereinafter to be described and in addition serve to determine the' space between the wall 1 of the inner tank I and the wall I of'the outer tank 2. The

coating 21 also has an opening 38 positioned between its tubular extension 2! and its outwardly flaring portion 30 in communication with the is adapted to engage the lower face of a second casting element 40 which has an upper outwardly flaring face to engage the lower stepped portion 3| of the wall 4. This casting 45 also has a. chambered opening 4| registering with the opening in the stepped portion 5| of the wall 4 and the opening 55 in the casting 21. These registering openings 55, 42 and 4| serve as an outlet to drain the water from the tank I. For controlling this outlet, the opening 4| is preferably provided with a tubular unit 45 connected to the valve unit 44 by the union 45 which valve 44 in turn is provided with a discharge conduit 45 and a handle 41 for controllihg the same. The handle 41 in the present instance is shown as pivotally connected with the link 45 extending up to the arm 49 and pivotally connected to it as shown which arm 49 in turn is fixed to the handle 55 suitably mounted in a bearing 5| connected to the wall element 24 as shown in Fig. 2.

When the nut 35 is drawn up tightly it will appear from the foregoing that it will securely anchor the outer tank 2 between the castings 45 and 21. For connecting the inner tank 5 to the outer tank, the screws 52 may be provided having the heads 53 engaging the outer face of the stepped portion of the wall 4 and extending through the flaring portion 35 of the casting 21 to and through the wall portion 1 of the inner tank 5 and provided with the wing nuts 54 on the inner face of the wall 1. These screws 52 are preferably equally spaced from one another, in the present instance'each shown as extending through a V-shaped baffling unit 55, see Fig. 2.

In the. present instance, there are provided six of the Y-shaped baffling units. 55 equally spaced from one another with their apices terminating at about the shoulder 55 of the casting 21. It will be noted that the V-shaped baiiling units 35 tend to restrict the width of the flow in an outward direction as distinguished from a construction, as an instance, in which single-walled baflle plates would divide this area into six spaces. Slightly spaced from the outer ends of the wall elements of each baflle unit 35, there are formed the baflie strips 55 connected to the outer face of the inner tank 5, each strip extending for a short distance along theouter face of the wall element 1 and then up along the outer face 'of the wall element 5. The height of these strips 55 conforms substantially to the height of the baflie units 35 and the outer edges thereof substantially engage the inner face of the outer tank 2 so that the spaces between the strips 55 form passages for'receiving the water being directed outwardly between adjacent baffling units 55. The strips of course also serve to space the inner tank 5 from the outer tank and to position the same relative to the upper bafiiing flange 15. The inner tanki preferably is providedwith two lower main rows of openings 51 and 55, an upper main row of openings 59 and an intermediate row of openings 55 between the rows of openings 51 and 59. In the present instance, the rows 51 and 55 are disposed at the level above the upper edge of the tray 5|, the .main row of openings 55 above the upper edge of the tray 52 and the intermediate row of widely spaced apart openings 55 disposed intermediate the upper and lower edges of the tray 52. The tray 5| is intended to carry the dishes preferably set edge-wise therein, with at least some of them extending above the upper edge of the tray 5|, and the tray 52 is intended as an instance to contain cutlery and the like and possibly smaller dishes. From the foregoing, as will hereinafter be described in detail, it will appear that when the impeller 34 secured to the shaft 25 is rotated, the valve 44 closed, and sufllcient water has been supplied to the tank I, that the water will be forced upward- 1y between the walls 5 and 5 of the tank I, some of it discharged through the openings 51, 55, 55 and 55 in streams and other portions of it deflected by the flange |5 in a sheet of water onto the contents in the trays 51 and 52. It is of course. understood that according to the well known practice, the water will have a predetermined temperature and be supplied with a suitable soap or scouring mixture and that the height of the water will also be determined according to the velocity of the motor. In other words, the object desired or the ideal condition desired is to have a sufllcient pressure maintained in the water by the impeller toforce a steady sheet ofwater from the flange I5 and at the same time a steady series of streams from the openings 51, 55, 55 and 55 onto the dishes or articles to be washed and with a sufficient force effectively to wash the same with the temperature of water and securing mixture used.

The impeller 54 consists of a base 55 having a plurality of openings 54 formed in the plane annular portion 55 disposed between the upwardly flaring portion 55 and the central cap portion 51, the cap portion 51 being secured to the upper end of the shaft 25 by any suitable means such as the pin 55. The openings 54 are disposed in the present instance, directly above the annular channel 51 so as to facilitate draining the water from the tank I after use. The upper face of the cap 51 is preferably conical, the apex of which extends to a height in the present instance to the lower surface of the flange 8 to prevent the formation of a whirlpool at the center of the impeller and facilitate the centrifugal force in directing the water outwardly to and into engagement with the impeller blades 59. In the present .instance, see Fig. 2, there are shown six arcuate impeller blades 59 overlapping one another, terminating at their outer edges at the outer end of the upper surface of the flaring portion 55 and terminating at'their inner ends just outside of the flange 5. From the foregoing it will be seen that the blades '55 will receive the water from the annular area 55 and then direct it between the faces of adjacent baflies 35, in turn to direct it between adjacent baffles 55 upwardly between the walls 3 and 5 of the tanks 2 and 5. The water in its upward course and due to the pressure generated is forced inwa dly through the openings 51, 55, 55 and 55 of the tank 5 in a plurality of streams and the surplus is thrust upwardly against the flange l5 and discharged in an annular sheet of .water onto the contents within the container 5.

The trays 5| and 52 are preferably composed of wide wire mesh such as conventionally used in dish drying racks and the like. In the present instance, the tray 5| has two annular reenforcements 15 and 1| composed of flat stock, the annulus 15 being disposedadjacent the outer upper edge of the tray 5| and the annulus 1| disposed adjacent the outer lower edge of the tray 5|. In addition, the tray 5| is provided with two handles composed of flat :stock, the

handle 12 on the one side alonebeing shown portion of the outercontainer and the space be-- which extends down and which is connected to a diagonally extending bottom reenforcement 18 connected toan upright of the handle at the other end of the container not shown. The other upright of the handle 12 is connected to the diagonally extending bottom reenforcing cross-piece 14 which extends to the other upright of the other handle not shown, The tray 62 is similarly provided with two annular reenforcing rings composed of flat stock, to wit, the ring 15 adjacent the outer upper edge of the tray 62 and the ring 18 adjacent the outer lower edge of the tray 62. The tray 62 is also provided with two handles one of which 11 being shown, the

' upright on one side extending down to the diagall ' inch, the number of holes 51, 58, 59 and 88 oneinner face 'of the container 5 and rests as shown on the upper end of the wall I where it leaves the cylindrical portion 8. The upper tray 62 will rest on the upper face of the handles 12 of the lower tray and preferably, although not necessarily, the ends of the cross pieces I8 and 19 may rest upon the upperfaces of the handles 12 as shown in Fig. 1.

Preferably the shaft 29 is provided with a packing 88 disposed between' the bushings 8| and 82 with a bearing ring 83 as shown between the, bushing 81 and the cap 61, and a nut 84 screwthreadedly connected to. the lower end of the tubular extension 21 to press the bushing 82 upwardly and position the packing 88, bushing 8i and ring 83 up against the lower end of the cap 61. The shaft 29 as shown is fixed to the hub 85 of the pulley 86 which is' connected by the belt 81 to the pulley 88 fixed to the shaft 88 of the motor 88 secured by the supporting port for the inner wall or the inner container 5. It is of course understood that in'turn the container 2 is preferably connected to a main support such as the platform or sinktable 8.

While it is obvious thatthe dimensions of the containers 2 and 5 will vary according to the quantity of dishes to be washed, the dimensions tainer havinga central opening at its lower end,

tween the containers'2 and 5 substantially threesixteenths of an inch, the space between the upface of the baflle plate I8 not in excess of one radii of the circle intersecting the outer ends of the blades 88, the water level not over five inches from the top ofthe eye of the impeller 34, and the revolutions per minute of the impeller 84:

between eight hundred and eight hundred and It is obvious that various changes and modifications may be made to the details of-construction without departing from the general spirit of the invention as set forth in the appended claim.

I claim: A dish washer including two nested containers, narrow bailles formed between said containers to space the same from one another and form shallow passages, each container having an upper cylindrical wall and a lower inwardly and downwardly tapering wall, the cylindrical wall of said inner container having aplurality of openings therein and thetaperingwall of the inner conan annular bafiie spaced from the upper edge of said inner container, 9; bearing bracket operatively connected to the lower end of the tapering wall of the outer container, a vertically extending shaft joumaled in said bracket, a driven pulley connected to, the lower outer end of said shaft,

a rotary agitator connected to-the upper end of said shaft and having impeller blades extending beyond the outer edge of the central opening of the inner container andbetween the opposing faces of the tapering walls of said containers for exercising an outward pressure on the water received by said blades, the bafiles between said container walls receiving the water sosubiected to pressure'by said blades and directing the same upwardly through said shallow passages to eject streams of water through said plurality of open- -ings and for directing the water into engagement with said annular baifle to issue an inwardly directed stream ofwater into said inner container over the upper edge of the cylindrical 'wallof said inner container, said bearing bracket having an upwardly flaring portion disposed between said rotary agitator and the innerface of the flaring wall of said outer containerand having a downof the impeller blades relative to the space between the containers, and that the inclination and number of baflles betweenthe two containers may vary according to the quantity of water used, it is believed desirable to call attention to the fact that excellent results have been achieved when the machine is characterized by the following dimensions, area relations, speed of motor and the like, to wit, the diameter of the outer container eighteen inches, the altitude from the top or;

eye portion of the impeller 84 to the upper edge of the outer container substantially twenty inches with a flare of about thirty degrees for the lower wardly extending tubular extension, an outer bracket engaging the outer face oi'the flaring wall ofsaid outer container and a' nut screwof said bearing bracket and said nut, the flaring connected to said .outer bracket in registration with theopening therein to control the'drainage from said containers.

MARSELIUS 'r. ASHE. 

